Instruction manual - HBSR – Refrigeration Switch (HBSR-003-UK)
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WE INCREASE
UPTIME
AND
EFFICIENCY
IN THE REFRIGERATION INDUSTRY
The easiest way to carry out fault detection is to have an extra mechanical part available.
The electronic part to be tested is installed on the extra mechanical part.
The electronics are tested using a piece of steel thread or non-isolated electrical cable and a glass of water
(see the illustration).
If the electronics switch the way they are supposed to during the test, one can exclude the possibility of a
fault on the sensor.
In case of faults, it is enough to only replace the electronic part.
Fault
Possible Reason
Correction of Fault
No LED is on when the sensor is
in the medium.
No supply to the sensor or
defective cable/plug.
Check the power supply or
replace the power supply cable.
No output (4 x red LEDs are on
but the output signal is not
active)
Check if the sensor's output
matches the control's input; if it
is a PNP/NPN and NO or NC
respectively.
See the output charge
instructions below.
Create alignment between the
sensor and control so that the
two are identical.
No contact activation
(4 x red LEDs are not on, even
though liquid should activate
the sensor)
There may be dirt between the
electronic housing and the
mechanical housing.
Separate the two parts and clean
the spring tip. Remember to apply
silicone grease on the spring tip
so as to avoid problems with
moisture.
Note! LED is always activated when approx. half of the sensors are covered or immersed in
refrigerant, irrespective of the sensor's output function NC/NO
.
